Ventilating fan



' of the fan housing against injury to Patented Mu. 21, 194s UNITED :siam

vniymarmo FAN Lee ns1-ton williams, Pittsburgh, rs,

Application May 8, 1944, Serial No. 534,612

\ 1 Claim. (Cl. 23o-264) IThis invention relates to motor-controlled fan construction, and more particularly to motorcontrolled fans used primarily for Ventilating purposes.

An important obJect of thelnvention 1s to provide a Ventilating fan wherein ali moving parts thereof are completely encased, providing a ian which will be absolutely .safe against injury to persons moving in proximity to the fan.

y Another important object of the invention is to provide a fan structure which will direct a volume of air over a large area in a sweeping motion, thereby accomplishing the same results as the well known oscillating rotary fan, with an exceptionally lessl number of working parts than used in rotary fan construction, and with considerably less power.

Stili another object of the invention is to provide a fan which, because of the small number of working parte and principle o1' operation, will be exceptionally quiet and cheap to manufacture, as compared with rotary fans in common use.

With the foregoing and other objects in view which will appear as the description proceeds, the

invention consists ol certain novel details of construction and combinations of parts hereinafter more fully described and pointed out in the claim,v it being understood -that changes may be made in the construction and arrangement of parts without departing from the spirit or the invenview taken -ward edge, is indicated by the reference character 5,\t he front wall of the housing being closed by the foraminous material 8 which guards @e front persons moving in proximity thereto. f

At the rear of the fan housing, where the of a. length' to extend housing.

The fan blade is indicated by the reference character Il' and is connected with the shaft 9 by means of the plates I2 which rest against the bearings 8, as clearly shown by Fig. 3 of the drawings.

Ths blade or fan member il is of a length to extend to a point inproximity to the inner surface oi the foraminous material 6, the blade :being cushioned at the end of its stroke, by means or the cushioning members I3 which are secured to the inner surfaces of the side walls l.

Secured to the upper end o the shaft .8, is an arm It to whichv the link |25 is connected, the linh it also having connection with the pulley i6 at it.

The pulley I8 is formed with a groove to am coodate-the V-shaped belt It that moves over the pulley I9 mounted on the shai't 2c of vthe motor di. A l f It will of course be understood that the motor, pulley and mechanism, employed in operating the shaft 9, are mounted in the motor housing t2 which rests on the top of the fan housing; near the rear end of 'the fan housing. A removable circuit.

From the foregoing it will he seen that due to the construction shown and described, the motor will operate to rotate the pulley I6 that in turn operates the shaft 9, through the link I5 and arm I4. The movement of the shaft S is such as to oscillate the fan blade Il, swinging it back and forth throughout the entire width of` the fan housing.y As the fan blade moves toward one of the side walls ofthe housing, it will be obvious that air wiilhbe forced outwardly through thefront wallwith excessive force, .to supply the necessary ventilation.

It might be further stated that the fan is ex- Y ceptionally quiet, and the movements of the fan blade Ilv are cushioned at their limits of movement by the cushioning members i3.

What is claimed is:

A motor-operated fan comprising a portable housing having a wide front wall constructed of foraminous material, and having side walls converging toward the front wall, upper and lbwer spaced bearings mounted within the housing at arm, a pulley to which the link is eccentrically connected, a motor mounted in the motor housing; a. belt adapted to transmit power to the pulthe rear thereof, a vertical shaft mounted within the spaced bearings, oneend of the shaft extending through the topeof the casing, a motor heus'- lng mounted on the fan housing and into which the shaft extends, acrank arm secured to the 5 shaft, a link pivotally connected with said crank LEE BARTON WLLIAMS. 

